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Finding the Fourth Proportional to 105,438.80, 158,158.20 and 100,888.40

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Solution

The fourth proportional to 105,438.80, 158,158.20 and 100,888.40 is: 151,332.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,438.80 : 158,158.20 = 100,888.40 : x
  2. Step 2: Convert to fraction form
    105,438.80/158,158.20 = 100,888.40/x
  3. Step 3: Cross multiply
    105,438.80x = 158,158.20 × 100,888.40
  4. Step 4: Simplify right side
    105,438.80x = 15,956,327,744.88
  5. Step 5: Solve for x
    x = 15,956,327,744.88/105,438.80
  6. Step 6: Final answer
    x = 151,332.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.